| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 735 |
11.9%
|
| 2 | Between 6 months to 1 year | 1131 |
18.3%
|
| 3 | Years | 3834 |
62%
|
| 9 | Missing | 484 |
7.8%
|
| 98 | Not applicable | 0 |
0%
|
| Sysmiss | 3243 |